During menstruation, the body has a special constitution and resistance decreases. Some women also have menstrual syndrome, such as loss of appetite, dysmenorrhea, and easy coldness, which can cause weakness. When the bleeding during menstruation is high, it can trigger anemia and weakness. You should pay attention to your diet and eat more nutritious food, such as lean meat, chicken soup, fish, fresh fruits and vegetables. At the same time, you should eat more blood and qi-supplementing foods, such as brown sugar, jujube, bird’s nest, aconite, etc. During menstruation weakness should pay attention to rest, avoid strenuous exercise, reduce work pressure and life stress, and maintain a good sleep. The symptoms of weakness will be relieved when the diet returns to normal after the menstruation and the body’s resistance strengthens and the symptoms of anemia disappear. During menstruation, pay attention to keep warm and avoid cold in the abdomen, otherwise dysmenorrhea will occur.